Product Feature: There are quick-release buckle on the side of air vent to prevent drop. The louver grille cover air vent is with mirror polishing, easy to clean, no dirt. Note: Please wear gloves when installing, and pay attention to the edge area to avoid scratching. Due to manual measurement, please allow +/- error of 1-3 mm. Specifications: Product Name: Louver Grille Cover Air Vent Material: Stainless Steel Color: Silver Panel Diameter: 120 mm/ 4.7 inch Bottom Mount Diameter: 70 mm/ 2.7 inch Height: 40 mm/ 1.57 inch Package Includes: 1 Pcs Louver Grille Air Vent + 1 Pair Gloves + 2 Pcs Screws + 2 Pcs Wall Anchors